Assembly language is a type of computer CPU programming language, which consists entirely of numbers and are almost impossible for humans to read and write. Each type of CPU has its own machine language and assembly language, so an assembly language program written for one type of CPU won't run on another. In the early days of programming, all programs were written in assembly language. Now, most programs are written in a high-level language such as C and C++. Programmers still use assembly language when speed is essential or when they need to perform an operation that isn't possible in a high-level language.

AutoCAD, a product of AutoDesk, is a popular computer-aided drafting (CAD) software package for 2D and 3D design and drafting. Initially a general-purpose 2D drafting program, AutoCAD has been extended into a family of products, used by land developers, architects, mechanical engineers, and other design professionals. The AutoCAD family of products, taken as a whole, is by far the most widely used CAD software in the world.

AutoDesk is a leading software company. Autodesk's flagship product is the AutoCAD® product, which introduced drafting on a PC. The widespread popularity of AutoCAD software forged our company’s lifetime commitment to practical innovation that drives productivity and profitability. AutoCAD has also paved the way for Autodesk technology leadership in industries such as building, infrastructure, manufacturing, media and entertainment, and wireless data.

Autodesk Animator is a 2D animation and painting program. The program is no longer supported or being developed.

AUTOEXEC.BAT is the name of a system file found on the MS-DOS operating system. It is a plain-text batch file that is located in the root directory of the boot device. AUTOEXEC.BAT is only used on MS-DOS or Microsoft Windows versions based on MS-DOS, such as Windows 3.x, Windows 95, Windows 98, and Windows Me. The file is executed once the operating system has been booted and after the CONFIG.SYS file has been processed. On Windows, this occurs before the graphical environment has been started.

AutoLISP is a dialect of Lisp programming language built specifically for use with the full version of AutoCAD and its derivatives like Autodesk Map 3D and Autodesk Architectural Desktop. Neither the application programming interface nor the interpreter to execute AutoLISP code are included in the AutoCAD LT product line.

Automated information system is an assembly of computer hardware, software, firmware, or any combination of these, configured to accomplish specific information-handling operations, such as communication, computation, dissemination, processing, and storage of information.

Automatic parallelization, also known as auto parallelization or Autoparallelization, is a computer compiler optimization technique, which refers to the use of a optimizing parallelizing compiler to convert sequential code into multi-threaded or vectorized (or even both) code in order to utilize multiple processors simultaneously in a shared-memory multiprocessor (SMP) machine. The goal of automatic parallelization is to relieve programers from the tedious and error-prone manual parallelization process.

Automatic vectorization, in the context of a computer program, refers to the transformation of a series of operations performed linearly, one step at a time, to operations performed in parallel, several at once, in a manner suitable for processing by a vector processor.

Autoresponder, also known as mailbot, is a program that automatically delivers information by e-mail.